How much does an evaporator coil cost to replace?

Q: How much does an evaporator coil cost to replace?

Replacing an evaporator coil costs $600 to $2,000 with a national average of $1,325, according to Bob Vila's evaporator coil guide (updated January 16, 2024), and $627 to $2,700 with an average of $1,350 according to This Old House's guide (updated April 6, 2026). Fixr's AC repair guide (updated January 29, 2026) prices the part at $400 to $2,700. The first two publishers print identical figures for the three coil types, and both disclose that they drew on the same upstream data.

The three published ranges

Source	Range	Average
Bob Vila, January 2024	$600 to $2,000	$1,325
This Old House, April 2026	$627 to $2,700	$1,350
Fixr, January 2026	$400 to $2,700	not stated

$25 between the two published averages, our subtraction, from guides more than two years apart. On most of our pages that kind of agreement is the reassuring part. Here it is the thing worth examining.

Why the agreement is weaker than it looks

Both publishers price the three coil types, and the numbers are identical:

Coil type	Bob Vila	This Old House
A-coil	$1,300	$1,300
N- or Z-coil	$1,550	$1,550
Slab unit	$1,200	$1,200

Three figures, two publishers, not a dollar between them. That is not independent confirmation, and both guides say why in their own small print.

This Old House prints a note under its coil-type table:

Note: The cost figures featured throughout this guide are based on averages from Angi, HomeGuide, and Atlas AC Repair.

Bob Vila writes that "according to Angi and HomeAdvisor, there is a typical replacement cost range of $600 to $2,000".

So both trace back to Angi. Two guides, published more than two years apart under different mastheads, resting on the same upstream dataset. We would not have found that by comparing the numbers; we found it because both publishers disclose it, which is to their credit.

Our reading, marked as ours. Treat the $1,325 and the $1,350 as one figure quoted twice, not as two measurements that agree. The only genuinely separate check on this page is Fixr, which states that it builds its figures from pricing databases, licensed contractors and industry experts, and which lands at $400 to $2,700 for the part. Its top end is identical to This Old House's, and its bottom end is lower than either.

One more thing about that note: Atlas AC Repair is a company that repairs air conditioners. We flag it the same way we flagged the duct cleaners' trade association on our duct cleaning page. It does not make the figures wrong. It does mean one of the three inputs behind the published average sells the work being priced.

A number on the This Old House page that contradicts its own text

That page's cost box reads:


Low end cost	$267
Average cost	$1,350
High end cost	$2,702

The text immediately above and below it says the range is $627 to $2,700. The low end in the box is $360 less than the low end in the sentence, our subtraction.

We cannot explain it, so we are not going to pretend to. Our note: the $627 figure appears three times on the page in prose and the $267 appears once inside a widget, so we have used $627 throughout and flagged the widget rather than quietly averaging them. The same widget feeds a lead form that passes your details to All Star Pros, which we also noted on our central air page.

What it actually costs by size

This Old House is the only one of the three that gives a low, average and high per tonnage, and this is the most useful table on the topic:

AC unit size	Low	Average	High
2 ton	$550	$1,250	$2,000
2.5 ton	$650	$1,400	$2,100
3 ton	$700	$1,550	$2,350
3.5 ton	$750	$1,650	$2,500
4 ton	$800	$1,700	$2,600
5 ton	$900	$1,800	$2,700

Bob Vila prices tonnage as single figures: 2 tons $550, 2.5 tons $675, 3 tons $925, 4 tons $1,000, 5 tons $1,075.

Our comparison, marked as ours. Bob Vila's 2-ton figure of $550 is exactly This Old House's low column, and its 5-ton figure of $1,075 sits above that column's $900 but well under the $1,800 average. So the Bob Vila tonnage row is close to a parts-only or best-case number, while the This Old House middle column is an installed job. They are not the same measurement, and neither page says which it is.

Fixr explains the width of the band plainly: components like coils vary a lot with AC tonnage, which is why a single national average is a weak guide here.

Labor is roughly the other half

Bob Vila: labor for an evaporator coil replacement typically ranges from $400 to $1,000, often adding up to the price of the coil itself, because handling refrigerant requires a license.

This Old House: technicians charge $75 and $150 per hour, attributed to HomeGuide.

Then there is the refrigerant. Bob Vila prices it at $4 to $10 per pound and says a coil replacement typically needs a refill at $200 to $500. This Old House quotes a homeowner who paid $80 per gallon across two visits.

Our note: pounds and gallons are not the same unit, the two figures are not comparable, and we are showing both rather than converting between them. What matters for a quote is that the refrigerant is a separate, real line item on top of the coil and the labor.

The rule for deciding

This Old House gives the test:

if the system is under 10 years old and repairs come out to 30% or less of the cost of a full replacement, repairing is typically more cost effective.

Our arithmetic, marked as ours. Fixr's central air guide puts a new central system at an average of $8,750. Thirty percent of that is $2,625. Every range on this page ends at or below $2,700, so only the very top of the largest jobs breaches the rule and everything else sits comfortably inside it.

So on a system under 10 years old, the coil is nearly always worth replacing. On a system over 10, the rule does not apply at all, and the question becomes the one on our AC compressor page: what else is the same age.

Bob Vila adds the practical half of that: evaporator and condenser coils have similar lifespans, so if one is near the end, have the other checked at the same time.

If it is under warranty

Bob Vila: where the coil is covered, the manufacturer typically pays for the part and you pay the labor, usually $100 to $400.

This Old House notes that federal incentives under the Inflation Reduction Act can cover up to 30%, to a maximum of $2,000, for qualifying efficient equipment. That applies to upgrades, not to a like-for-like coil swap, which is why we have not put it in the headline figures.

Before you authorise the work

Ask which coil type and which tonnage. A-coil at $1,300 against an N- or Z-coil at $1,550 is a real difference, and tonnage moves the installed job by over $500.
Ask whether the quote includes refrigerant. Bob Vila puts the refill at $200 to $500 on its own.
Ask the age of the system. Under 10 years, the 30% rule usually says repair. Over 10, price a replacement alongside.
Ask whether the new coil matches the outdoor condenser's tonnage. This Old House's HVAC expert names a mismatch as the thing to avoid.
Ask whether the condenser coil should be checked too. Same age, same expected life, and one visit instead of two.

Tonnage drives this price more than anything else, and if you are not sure yours is right, our sizing page sets out how it should have been calculated. If the coil keeps icing rather than failing outright, our frozen AC page covers what that points at.

Sources

Price figures are national US ranges from the sources above as of the date shown. Your local price depends on labor rates, permits and site conditions. Read how we get our numbers.